<!DOCTYPE html>
<html>

<body>

    <h1>My First Google Map</h1>

    <div id="googleMap" style="width:100%;height:400px;"></div>

    <script>
        function myMap() {
            var mapProp = {
                center: new google.maps.LatLng(51.508742, -0.120850),
                zoom: 5,
            };
            var map = new google.maps.Map(document.getElementById("googleMap"), mapProp);
        }
    </script>

    <script
        src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAQkTJMe10IonwSlTXCPNZfPk6yt1YvF_8&callback=myMap"></script>

</body>

</html>